Mechanicals · definition
An enclosure where wires connect; all splices must be in an accessible box, never buried in a wall. A common code violation in DIY work.
Source: OSHA — 1910.305 Wiring Methods, Components, and Equipment
Where this term lands on a Columbus budget
The cost pages carry the current local ranges, and the guides explain what moves them. A published range becomes a project number only after someone looks at the site.